Technical Specifications Basic Identification Brand: Alstom Model Series: SIR BASIC Product Type: Forcibly Guided Safety Relay / Safety Control Relay Standard Compliance: EN 50205 Type A, EN 60947-5-1, IEC 61131-2 Coil Control Parameters Rated Control Supply Voltage (Us): DC24V / AC110V / AC220V (multiple options) Operating Voltage Range: 0.7 ~ 1.1 × rated voltage Coil Power Consumption: 1.2W (DC) / 1.8VA (AC) Pull-in Voltage: ≤ 0.7 Us Drop-out Voltage: ≥ 0.1 Us Coil Insulation: Reinforced insulation, withstand 5kV dielectric test Contact Electrical Ratings Contact Configuration Options: 2NO+2NC / 3NO+1NC (forcibly guided structure) Contact Material: AgSnO2 with thin gold plating, anti-welding Rated Operational Load: AC-15: 250VAC, 6A resistive / inductive DC-13: 24VDC, 5A Rated Switching Capacity: Max 1500VA @250VAC Dielectric Withstand Voltage: Coil ↔ Contacts: 5000VAC, 50Hz, 1min Between independent contact sets: 4000VAC, 50Hz, 1min Insulation Resistance: >100MΩ at 500VDC Electrical Service Life: ≥100,000 switching cycles (rated load, 360 cycles/hour) Mechanical Service Life: ≥10,000,000 cycles Safety Design Features Forcibly guided contact mechanism (EN50205 Type A): NO & NC contacts cannot close simultaneously Creepage & clearance distance ≥10mm between coil and contact circuits Pollution Degree 3, Overvoltage Category III CTI tracking resistance ≥250 Built-in anti-vibration structure for railway rolling stock Mechanical & Installation Mounting: Standard 35mm DIN rail snap-on installation Terminal Type: Screw clamp terminals Applicable Wire Gauge: 0.75 ~ 2.5 mm² copper wire Tightening Torque: 0.8 ~ 1.0 N·m Module Width: 17.5 mm (1 standard modular unit) Overall Dimension: H 82 mm × W 17.5 mm × D 70 mm Net Weight: ~0.11 kg Environmental Specifications Operating Ambient Temperature: -20 ℃ ~ +60 ℃ Storage Temperature: -40 ℃ ~ +85 ℃ Relative Humidity: 5% ~ 95% non-condensing Vibration Resistance: 10–150Hz, 1.5mm amplitude (railway grade) Shock Resistance: 10g, 11ms half-sine wave